errors in zypper

Building repository 'multimedia:apps' cache ...................................................................................................[done]
Retrieving repository 'openSUSE:Tumbleweed' metadata ---------------------------------------------------------------------------------------------[/]
Warning: The gpg key signing file 'repomd.xml' has expired.
  Repository:       openSUSE:Tumbleweed                                                     
  Key Name:         openSUSE:Tumbleweed OBS Project <openSUSE:[email protected]>
  Key Fingerprint:  56FE3F66 EE9AD664 DD8978DF 03FCF140 B367F5CD                            
  Key Created:      Mon 18 Feb 2013 02:09:00 PM BRT                                         
  Key Expires:      Wed 29 Apr 2015 02:09:00 PM BRT (EXPIRED)                               
  Rpm Name:         gpg-pubkey-b367f5cd-5122602c                                            
Retrieving repository 'openSUSE:Tumbleweed' metadata ..........................................................................................[done]
Building repository 'openSUSE:Tumbleweed' cache ...............................................................................................[done]
Retrieving repository 'multimedia:libs' metadata ..............................................................................................[done]
Building repository 'multimedia:libs' cache ...................................................................................................[done]
Retrieving repository 'mozilla' metadata ......................................................................................................[done]
Building repository 'mozilla' cache ...........................................................................................................[done]
Retrieving repository 'packman' metadata ---------------------------------------------------------------------------------------------------------[\]

Warning: Digest verification failed for file 'primary.xml.gz'
[/var/cache/zypp/raw/packmanhCTr6Z/repodata/primary.xml.gz]

  expected fa504fa321bee2d9c9e98f37add050e34481501a486a387b50512324f608719f
  but got  27b7146491fe62499fbdbb0c1e90dde7fc16e8801a64d209b93a24789766a8df

Accepting packages with wrong checksums can lead to a corrupted system and in extreme cases even to a system compromise.

However if you made certain that the file with checksum '27b7..' is secure, correct
and should be used within this operation, enter the first 4 characters of the checksum
to unblock using this file on your own risk. Empty input will discard the file.

Unblock or discard? [27b7/? shows all options] (discard)